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Steering control device

Inactive Publication Date: 2012-11-01
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0028]According to the steering control device of the invention, it is possible to give an appropriate reaction force to the driver.

Problems solved by technology

However, in some cases, when the vehicle travels at a low speed, the driver wants to rotate the steering wheel at a small angle to turn the vehicle at a large angle.
Therefore, when the transmission ratio of the steering angle to the rotation angle of the steering wheel is constant, the convenience of the actual driving operation is low.

Method used

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first embodiment

[0045]As shown in FIG. 1, a vehicle provided with a steering device 10 according to the invention includes a steering shaft 11 which is connected to a steering device 28 and a steering wheel 12 which is connected to the end of the steering shaft 11. The steering wheel 12 can change a reference position (initial position) relative to the driver according to the build or taste of the driver.

[0046]Specifically, the steering shaft 11 includes a tilt / expansion mechanism 21. The tilt / expansion mechanism 21 can change the inclination angle (tilt angle) of an axis line LS of the steering shaft in the front-rear direction of the vehicle. The tilt / expansion mechanism 21 can telescopically extend and contract the steering shaft 11 and change the amount of extension and contraction (telescopic amount) of the steering shaft 11. In this way, the tilt / expansion mechanism 21 can adjust the distance between the steering wheel 12 and the driver and the height of the steering wheel 12 from the floor o...

second embodiment

[0089]Next, the invention will be described. As shown in FIG. 15, in this embodiment, a steering control device includes, as a push-pull reaction force device 34, a middle point return spring 34d, oil 34e, a piston 34f, a damping force variable valve 34g, a base valve 34h, a free piston 34i, and a gas spring 34j. In this embodiment, the piston 34f, the damping force variable valve 34g, and the base valve 34h can be used to change the damping force of motion in the push-pull direction. The free piston 34i and the gas spring 34j are provided in order to absorb volume when the slide shaft 34a is moved to the piston 34f. In this way, in this embodiment, it is possible to change the reaction force in the push-pull direction by changing the damping force of motion in the push-pull direction.

[0090]The embodiments of the invention have been described above, but the invention is not limited to the above-described embodiments. Various modifications of the invention can be made.

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Abstract

A CPU 26 changes a turning angle corresponding to a steering angle MA_TEMP required for a steering device 28 to steer a host vehicle, depending on the amount of operation for moving a steering wheel 12 at a reference position in a tilt direction and a push-pull direction. A tilt reaction force device 32 and a push-pull reaction force device 34 generate a reaction force against a second operation amount for moving the steering wheel 12 from the reference position according to the reference position of the steering wheel 12 relative to the driver which is adjusted by a tilt / expansion mechanism 21. In this way, even when the reference position of the steering wheel 12 is changed, it is possible to give an appropriate reaction force to the driver since a reaction force against, for example, an operation of pushing or pulling the steering wheel 12 is generated according to the reference position of the steering wheel 12 relative to the driver.

Description

TECHNICAL FIELD[0001]The present invention relates to a steering control device that controls the steering of a host vehicle.BACKGROUND ART[0002]In general, the driver rotates a steering wheel at a predetermined angle to steer the vehicle. In general, the transmission ratio of a steering angle to the rotation angle of the steering wheel is constant.[0003]However, in some cases, when the vehicle travels at a low speed, the driver wants to rotate the steering wheel at a small angle to turn the vehicle at a large angle. In addition, in some cases, when the vehicle travels at a high speed, the driver wants to reduce the steering angle with respect to the rotation angle of the steering wheel to stably drive the vehicle. Therefore, when the transmission ratio of the steering angle to the rotation angle of the steering wheel is constant, the convenience of the actual driving operation is low.[0004]For example, Patent Literature 1 discloses a steering device in which the steering wheel can ...

Claims

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Application Information

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IPC IPC(8): B62D6/00
CPCB62D1/10B62D1/18B62D1/187B62D6/008B62D6/001B62D6/002B62D6/007B62D5/008
Inventor KIMURA, YUKIHIDEOSUMI, RYOTA
Owner TOYOTA JIDOSHA KK
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